See Mark Potter's Nightly News report about secret subs at the bottom of this post.

Hans Deryk / Reuters

A crew member from the U.S. Coast Guard Cutter Oak counts packaged bales of 15,000 pounds of cocaine worth more than $180 million unloaded at Base Support Unit Miami August 2. The haul was recovered from a self-propelled submersible vessel in the western Caribbean Sea July 13, 2010 after being spotted by U.S. Coast Guard patrol.

U.S. Coast Guard / Getty Images

In this handout provided by U.S. Coast Guard, the crew of the Coast Guard Cutter Seneca interdicts a drug smuggling, self-propelled semi-submersible (SPSS) vessel carrying cocaine on an unspecified date in the western Caribbean Sea. It was the first interdiction of an SPSS in the Caribbean.